Re: [Gcl-devel] Re: unexec and fedora core 4

[Camm Maguire]

Juho Snellman <address@hidden> writes:

> <address@hidden> wrote:
> > Greetings!  I am a developer of GCL, which shares unexec with emacs.
> > I have noticed on certain recent Fedora Core 4 machines, binaries
> > produced with unexec cannot mprotect memory (allocated with brk)
> > PROT_EXEC (returning EACCESS, i.e. permission denied), whereas
> > binaries output by ld can do so just fine.  This does not vary with
> > exec-shield or randomize_va_space settings, and appears quite machine
> > specific.  The same binary which functions perfectly normally on one
> > fc4 machine shows this failure only on another machine.  I have as yet
> > been unable to correlate this with dynamic library placement, or other
> > settings in /proc/sys.
> 
> Just a guess, but this might be related to SELinux. Do the machines
> have differences in /etc/selinux/config?
> 

Bingo! (I think)  The config files are identical, but the problem
machine has a 'strict' subdirectory with a host of files and options.
Any idea of what I should look for herein, and what this could have to
do with unexec vs ld?

Thank you so much!

> -- 
> Juho Snellman
> 
> 
> 
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> 

-- 
Camm Maguire                                            address@hidden
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